Q1 is "List(radio)" question with five answer options,Q2 is "Equation type" question and Q3 is "Language switch" question with two languages 1:Hindi and 2:English.I will hide both Equation and "Language switch" question.I want to set Hindi if respondent select 2nd radio button at Q1 and set English if respondent select 5th radio button at Q1. I think we can do it by using some equation in Equation type question .I am new to EM so please tell me what would be the equation to do this.

EM can set existing answers but only for next page (not in javascript)
With equation question type, try:
{Q3=if(Q1.NAOK=="A2","in",if(Q1.NAOK=="A5","en",""))}

Denis

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first a répondu au sujet : set language switch question using .equation

I am able to set the Q3(language question) based on selection on Q1.But things didnt show up as expected.Suppose I start survey with Hindi language and select 5th radio button at Q1 then Q3(language question) gets automaticlly set to English.But still the survey continue in Hindi .I guess that the mannual selection on language on Q3 triggers somthing that change survey language for rest of the survey.I dont want respondent to see language dropdown question and the survey language should be dependent on Q1.

Think need a $_POST something, but theni you can have a look at "langage changer"JavaScript : sending a $_POST can be OK.

Have to look again.

Assistance on LimeSurvey forum and LimeSurvey core development are on my free time.
I'm not a LimeSurvey GmbH member,
professional service on demand
(or search sondages pro).
An error happen ? Before make a new topic : remind the
Debug mode
.